Object-Oriented Modeling and Simulation of AC/DC Systems

This paper summarizes the experience gained while using the object-oriented language Modelica for modeling an AC/DC electric distribution system: the Naval electric shipboard power generation and DC distribution testbed. Modelica´s hybrid system modeling capabilities allow efficient formulation of continuous and discrete information processing systems and these have been used to map the power system´s components to objects in Modelica. The language clearly shows its advantages in the design phase, as domain knowledge can be directly incorporated into the basic and well-defined components. The limiting factor of using this approach could be the large set of algebraic-differential equations handled at event detection that would slow down the simulation.